Yuyang Wang, Qing Wen, Ye Chen et al.

Energy • 2020

Ting Liu, Yangyang Yu, Tao Chen et al.

Biotechnology and Bioengineering • 2016

In this study, a synthetic microbial consortium containing exoelectrogen Shewanella oneidensis MR-1 and riboflavin-producing strain, Bacillus subtilis RH33, was rationally designed and successfully constructed, enabling a stable, multiple cycles of microbial fuel cells (MFCs) operation for more than 500 h. The maximum power density of MFCs with this synthetic microbial consortium was 277.4 mW/m 2 , which was 4.9 times of that with MR-1 (56.9 mW/m 2 ) and 40.2 times of RH33 (6.9 mW/m 2 ), separately. At the same time, the Coulombic efficiency of the synthetic microbial consortium (5.6%) was higher than MR-1 (4.1%) and RH33 (2.3%). Regardless the high concentration of riboflavin produced by RH33, the power density of RH33 was rather low. The low bioelectricity generation can be ascribed to the low efficiency of RH33 in utilizing riboflavin for extracellular electron transfer (EET). In the synthetic microbial consortium of MR-1 and RH33, it was found that both mediated and direct electron transfer efficiencies were enhanced. By exchanging the anolyte of MR-1 and RH33, it was confirmed that the improved MFC performance with the synthetic microbial consortium was because MR-1 could efficiently utilize the high concentration of riboflavin produced by RH33. Biotechnol. Bioeng. 2017;114: 526-532. © 2016 Wiley Periodicals, Inc.

Md Tabish Noori, Gourav Dhar Bhowmick, Bikash R. Tiwari et al.

Journal of The Electrochemical Society • 2018

Cu-Sn bimetallic alloy supported on acetylene black was prepared and tested under different loadings per unit cathode surface area viz. 1 mg.cm−2, 2 mg.cm−2 and 5 mg.cm−2 as a catalyst to improve the oxygen reduction reaction (ORR) and to enhance performance of the microbial fuel cell (MFC). Electrochemical analyses were performed to evaluate the ORR kinetics. Results of cyclic voltammetry showed multiple redox current peaks for all the loadings of Cu-Sn with positive onset potential of ∼0.25 V. Among different loadings, cathode with Cu-Sn loading of 2 mg.cm−2 proved to be the best choice for application in MFC, due to less charge transfer resistance and high redox current. Power density and coulombic efficiency of 470 mW.m−2 and 36%, respectively, were obtained from MFC using Cu-Sn catalyzed cathode with a loading of 2 mg.cm−2, which was higher than the MFCs using cathodes with 1 and 5 mg.cm−2 of Cu-Sn loadings and it was even found slightly higher than the MFC using Pt-C catalyst on cathode. Power generation per unit cost of catalyst for MFC using Cu-Sn catalyst was found to be 11-fold higher than the MFC using Pt-C cathode, ascertaining former as low-cost cathode catalyst for harvesting more power from MFCs.

Dipak A. Jadhav, Makarand M. Ghangrekar

International Journal of Environmental Technology and Management • 2020

Single-chambered microbial fuel cells (MFCs) were inoculated with different proportions of Shewanella putrefaciens and mixed-anaerobic sludge, viz. 100:0% (MFC-1), 0:100% (MFC-2), 10:90% (MFC-3), 30:70% (MFC-4) and 50:50% (MFC-5). Performance of these MFCs was evaluated using different electrochemical analyses. Due to specific substrate-selectivity, MFC-1 showed lower power (1.22 W.m−3) than MFC-2 (2.15 W.m−3). Power performance increased from 2.21 (MFC-3) to 2.56 W.m−3 (MFC-4) with increased fraction of Shewanella from 10 to 30% in the inoculum, and power density further enhanced to 3.1 W.m−3 in MFC-5 inoculated with equal-fraction of Shewanella and mixed sludge. Bioelectrochemical analyses showed higher electron transfer rate and lower charge-transfer resistance in MFC-5 due to synergy between both the inoculums and promoted the electron transfer at anode. Thus, inoculation of MFC with equal-fraction of mixed-anaerobic sludge and Shewanella showed effective bio-augmentation to improve the anodic bioactivity and power generation from MFC.

Feng Liu, Lei Sun, Jinbao Wan et al.

RSC Advances • 2019

A novel approach, combining a microbial fuel cell (MFC) with an integrated vertical flow constructed wetland (IVCW), was developed, and its ability to simultaneously produce electrical energy while treating swine wastewater was verified. The system combined the singular water flow path of a traditional vertical flow constructed wetland (upflow and downflow)-microbial fuel cell (CW-MFC), which demonstrates better characteristics in the aerobic, anoxic, and anaerobic regions. It not only enhanced the anti-pollution load ability and the organic compound removal effect, but also improved the gradient difference in the redox potential of the system. The results showed that the structure and substrate distribution in the device could both improve swine wastewater treatment and increase bioelectricity generation capabilities. The average chemical oxygen demand (COD) and ammonia nitrogen (NH 4 + -N) removal efficiencies were as high as 79.65% and 77.5%, respectively. Long-term and stable bioelectricity generation was achieved under continuous flow conditions. The peak values of the output voltage and power density were 713 mV and 456 mW m -3 . The activated carbon layer at the bottom of this system provided a larger surface for the growth of microbes. It showed significant promotion of the relative abundance of electrochemically active bacteria, which might result in the increase of bioelectricity generation in integrated vertical flow constructed wetland-microbial fuel cells (IVCW-MFCs). The electrochemically active bacteria, Geobacter and Desulfuromonas , were detected in the anodic biofilm by high-throughput sequencing analysis.

Fatemeh Nourbakhsh, M. Mohsen‐Nia, Mohammad Pazouki

Bioprocess and Biosystems Engineering • 2017

Majid Khazaee, Alireza Rezaniakolaie, Lasse Rosendahl

Nano Energy • 2020

Yun-Yeong Lee, Tae G. Kim, Kyung‐Suk Cho

Journal of Environmental Science and Health Part A • 2016

The chemical oxygen demand (COD) removal, electricity generation, and microbial communities were compared in 3 types of microbial fuel cells (MFCs) treating molasses wastewater. Single-chamber MFCs without and with a proton exchange membrane (PEM), and double-chamber MFC were constructed. A total of 10,000 mg L(-1) COD of molasses wastewater was continuously fed. The COD removal, electricity generation, and microbial communities in the two types of single-chamber MFCs were similar, indicating that the PEM did not enhance the reactor performance. The COD removal in the single-chamber MFCs (89-90%) was higher than that in the double-chamber MFC (50%). However, electricity generation in the double-chamber MFC was higher than that in the single-chamber MFCs. The current density (80 mA m(-2)) and power density (17 mW m(-2)) in the double-chamber MFC were 1.4- and 2.2-times higher than those in the single-chamber MFCs, respectively. The bacterial community structures in single- and double-chamber MFCs were also distinguishable. The amount of Proteobacteria in the double-chamber MFC was 2-3 times higher than those in the single-chamber MFCs. For the archaeal community, Methanothrix (96.4%) was remarkably dominant in the single-chamber MFCs, but Methanobacterium (35.1%), Methanosarcina (28.3%), and Methanothrix (16.2%) were abundant in the double-chamber MFC.

Smita S. Kumar, Vivek Kumar, Ritesh Kumar et al.

Energy • 2019

Khaled Elmaadawy, Bing Liu, Gamal K. Hassan et al.

Process Safety and Environmental Protection • 2022

Baojian Jing, Shijie You, Yuanyuan Ma et al.

Applied Catalysis B: Environmental • 2018

Meng Li, Zhou Juan, Yongguang Bi et al.

Chemical Engineering Journal • 2019

Mukesh Sharma, Pranjal P. Das, Trishla Sood et al.

Journal of environmental chemical engineering • 2021

Hend Omar Mohamed, Enas Taha Sayed, M. Obaid et al.

International Journal of Hydrogen Energy • 2018

Sung Hyun Lee, Kyeong-Seok Lee, Saurav Sorcar et al.

Journal of Photochemistry and Photobiology A Chemistry • 2017

Dongliang Wang, Jingping Hu, Bing Liu et al.

Journal of Hazardous Materials • 2021

Yingwen Chen, Liuliu Chen, Peiwen Li et al.

Energy • 2016

Naeem Ali, Maira Anam, Sameen Yousaf et al.

Iranian Journal of Biotechnology • 2017

Background: Different concentrations of the simple carbon substrates i.e. glucose, fructose, and sucrose were tested to enhance the performance of the mediator-less double chamber microbial fuel cell (MFC). Objectives: The power generation potential of the different electron donors was studied using a mesophilic Fe (III) reducer and non-fermentative bacteria Pseudomonas aeruginosa -isolated from municipal wastewater. Materials and Methods: A double chamber MFC was operated with three different electron donors including glucose, sucrose, and fructose. Substrate utilization pattern was determined through chemical oxygen demand (COD) removal rate and voltage generation. In addition, electrochemical, physicochemical, and microscopic analysis of the anodic biofilm was conducted. Results: P. aeruginosa was proven to effectively utilize hexose and pentose sugars through anode respiration. Higher power density was generated from glucose (136 ± 87 mWm 2 ) lead by fructose (3.6 ± 1.6 mWm 2 ) and sucrose (8.606 ± mWm 2 ). Furthermore, a direct relation was demonstrated between current generation rate and COD removal efficiency. COD removal rates were, 88.5% ± 4.3%, 67.5% ± 2.6%, and 54.2% ± 1.9% with the three respective sugars in MFC. Scanning electron microscopy (SEM) demonstrated that the bacterial attachment was considerably abundant in glucose fed MFC than in the fructose and sucrose operated MFC. Conclusion: This study has revealed that electron donor type in the anodic compartment controls the growth of anodic biofilm or anode-respiring bacteria (ARB).

Yoong-Sin Oon, Soon‐An Ong, Li‐Ngee Ho et al.

Chemical Engineering Journal • 2018

Oihane Monzón, Yu Yang, Qilin Li et al.

Biochemical Engineering Journal • 2016

Dengjie Zhong, Xinrong Liao, Yaqi Liu et al.

Biosensors and Bioelectronics • 2018

Aryama Raychaudhuri, Manaswini Behera

Environmental Technology & Innovation • 2019

Enas Taha Sayed, Hussain Alawadhi, A.G. Olabi et al.

International Journal of Hydrogen Energy • 2020

Yifei Tao, Qiongzhen Liu, Jiahui Chen et al.

Environmental Science & Technology • 2016

Microbial fuel cells (MFCs) encompass complex bioelectrocatalytic reactions that converting chemical energy of organic compounds to electrical energy. Improving the anode configuration is thought to be a critical step for enhancing MFCs performance. In present study, a hierarchically structured textile polypyrrole/poly(vinyl alcohol-co-polyethylene) nanofibers/poly(ethylene terephthalate) (referred to PPy/NFs/PET) is shown to be excellent anode for MFCs. This hierarchical PPy/NFs/PET anode affords an open porous and three-dimensional interconnecting conductive scaffold with larger surface roughness, facilitating microbial colonization and electron transfer from exoelectrogens to the anode. The mediator-less MFC equipped with PPy/NFs/PET anode achieves a remarkable maximum power density of 2420 mW m(-2) with Escherichia coli as the microbial catalyst at the current density of 5500 mA m(-2), which is approximately 17 times higher compared to a reference anode PPy/PET (144 mW m(-2)). Considering the low cost, low weight, facile fabrication, and good winding, this PPy/NFs/PET textile anode promises a great potential for high-performance and cost-effective MFCs in a large scale.

Sovik Das, Indrajit Chakraborty, P. P. Rajesh et al.

Journal of Hazardous Toxic and Radioactive Waste • 2020

A microbial fuel cell (MFC) is a bioelectrochemical system that can recover bioelectricity from wastewater, with simultaneous organic matter removal from the wastewater. However, due to the inferior power production of MFCs and the higher fabrication cost, successful field-scale demonstration of this novel technology is still to be accomplished. Power production of MFCs can be improved by employing a cathode catalyst to overcome the sluggish oxygen reduction reaction (ORR) on bare carbon-based electrodes. In this regard, to enhance the power generation in a MFC, three MFCs inoculated with marine algae Chaetoceros pretreated mixed bacterial culture were operated with different cathode catalysts. To examine the effect of cathode catalyst on power generation, Pd and MnO2 were used as cathode catalysts in the MFC-Pd and MFC-Mn, respectively, while the third MFC (MFC-C) was devoid of any catalyst. The chemical oxygen demand (COD) removal efficiency was estimated to be 63.3% ± 1.83%, 62.8% ± 2.15%, and 61.3% ± 1.76% for MFC-C, MFC-Mn and MFC-Pd, respectively. The MFC-Pd exhibited highest coulombic efficiency of 25.82% ± 2.1%, followed by MFC-Mn (17.47 ± 1.6%) and MFC-C (10.68% ± 2.8%). The power density of MFC-Pd, MFC-Mn, and MFC-C was estimated to be 63.94, 27.12, and 10.46 mW/m2, respectively. The results exhibited that the application of Pd as a cathode catalyst yields higher power in a MFC. Furthermore, the maximum power density of MFC-Mn, with MnO2 as cathode catalyst, was 2.36 fold lesser than that obtained from the MFC-Pd and 2.59 times higher than MFC-C. In addition, the wastewater treatment efficiency measured in terms of COD removal efficiency was similar for all the MFCs given that similar operating conditions (Chaetoceros pretreatment on the anodic inoculum) were maintained in the anodic chamber of all these MFCs. However, as MnO2 is a low-priced material, the energy recovered per dollar spent on the catalyst is six times higher for MnO2 than for Pd. Thus, the combination of MnO2 as cathode catalyst and Chaetoceros as a methanogenesis inhibitor demonstrated a low-cost, sustainable solution for power enhancement in MFCs.

Amin Taheri Najafabadi, Norvin Ng, Előd Gyenge

Biosensors and Bioelectronics • 2016

P. P. Rajesh, Md Tabish Noori, Makarand M. Ghangrekar

Journal of Hazardous Toxic and Radioactive Waste • 2020

The combined effect of polyaniline (PANI) coating on the carbon felt anode material and anodic inoculum pretreatment using Chaetoceros was evaluated in this study. The microbial fuel cell (MFC) with a PANI modified anode could generate a maximum power density of 216 mW/m2 (20.52 W/m3). Similarly, MFC with a pretreated inoculum in the anodic chamber and an unmodified or PANI modified anode generated significantly higher coulombic efficiency (CE) compared with MFCs without any inoculum pretreatment and anode modification, owing to the effective inoculum pretreatment for the enrichment of electrogens. A 17% increase in CE was noted in MFC with a PANI modified anode (42.45%) compared with MFCs using a bare carbon felt anode (35.98%) due to the enhanced bioelectrochemical activity of the anode. The oxidative current was found to be higher in MFC with a PANI modified anode, which further supports the difference in power density. Reduction in charge transfer resistance was also observed in MFCs with a PANI modified anode during electrochemical impedance spectroscopy (EIS) analysis. The findings of this study reveal that electricity generation in MFCs can be enhanced by PANI modification of the anode and inoculum pretreatment using Chaetoceros marine algae.

Nan Jiang, Jialing Song, Mengying Yan et al.

Bioresource Technology • 2022

Huiyang Wen, Hui Zhu, Baixing Yan et al.

The Science of The Total Environment • 2021

Meng Li, Shaoqi Zhou

Bioresource Technology • 2018

Ying Zhou, Nengwu Zhu, Wenying Guo et al.

Journal of Environmental Management • 2018

Aryama Raychaudhuri, Manaswini Behera

Electrochimica Acta • 2020

Prachi Vikas Moharir, Ajay R. Tembhurkar

International Journal of Hydrogen Energy • 2018

Sovik Das, Makarand M. Ghangrekar

Environmental Technology • 2019

Microbial fuel cell (MFC) is a device that oxidizes the organic matter present in wastewater and simultaneously generates electricity from it. For practical applications, the power production of MFCs needs to be enhanced and the use of novel anode and cathode catalyst can certainly help in this regard. Such a novel catalyst, WO 3 , was explored as both anode and cathode catalyst in this study. Performance of MFCs was enhanced when WO 3 was used as an electrocatalyst. The maximum power density of MFC was increased by five times when WO 3 was used as anode catalyst and by four times when it was used as cathode catalyst as compared to control MFC using electrode without any catalyst. Almost six times increment in maximum power production of MFC was observed when WO 3 was used as catalyst on both the electrodes. Electrochemical analysis of WO 3 also proved that it could enhance the current density of the modified electrode owing to its electrochemical catalytic properties. Furthermore, chemical oxygen demand (COD) removal of MFC having WO 3 coated electrodes was also observed to be higher, thus suggesting an overall enhancement in the performance of MFC by the use of WO 3 as an electrocatalyst.

Saranya Narayanasamy, J. Jayapriya

Chemical Engineering Journal • 2018

Jinmeng Liu, Xinhua Wang, Zhiwei Wang et al.

Water Research • 2016

Fei Xu, De-long Ouyang, Eldon R. Rene et al.

Bioresource Technology • 2019

Fabrice Ndayisenga, Zhisen Yu, Yang Yu et al.

Bioresource Technology • 2018

Mukesh Sharma, Pranjal P. Das, Trishla Sood et al.

Journal of Electroanalytical Chemistry • 2021

Qiangsheng Huang, Peijiang Zhou, Hua Yang et al.

Chemical Engineering Journal • 2017